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An ore sample contains 11% impurity in additon to a mix of CuS and Cu2S. Heating 100g of the mix produces 75.4g of copper metal with a purity of 89.5%. What is weight 5 of CuS and Cu2S in the ore?
A 500-liter tank contains air at pressure 300 kPa and temperature 500K. Calculate the mass of the air in the tank
A 1- flask is filled with 1.20 of argon at 25 . A sample of ethane vapor is added to the same flask until the total pressure is 1.45 .
Calculate how many litres of water would be required to produce 10 cm^3 of calcite based on having 1.81 x 10^-5 moles of calcite in 1 L of water
Balance the following electrochemical equation for an acidic environment. NO3- + Cu à NO + Cu2+. Balance the following electrochemical equation for a basic environment. Cl- + Ag+ à Ag + ClO2-
A person ate 0.919 pound of cheese (an energy intake of 7350 kJ). Suppose that none of the energy was stored in his body. What mass (in grams) of water would he need to perspire in order to maintain his original temperature? (It takes 44.0 kJ to v..
Identify the intermolecular attractions for dimethyl ether and for ethyl alcohol. Which molecule is expected to be more soluble in water?
A gaseous fuel mixture stored at 752mmHg as well as 298K contains only methane (CH4) and propane (C3H8). While 12.6 L of this fuel mixture is burned it produces 762kJ of heat.
For a solution of 0.10M H3PO4, calculate the concentration of all the ionic species in solution (i.e., H+, OH-, H2PO4-, HPO42-, PO43-)
Why is this isolation so difficult? Please explain using the isoelectric point and the effect PH will have on the structure of your product
A 0.150-mole quantity of CoCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Co2 ions at equilibrium? Assume the formation constant of Co(NH3)62 is 5.0× 1031.
what mass of cacl2 when dissolved in 100.00 g of water gives an expected freezing point of 5.0degc cacl2 is ionic?
2,2-dibromo-3-methylpentane can be prepared by an addition reaction of excess HBr with an alkyne. Draw the structure of the alkyne, name it, and write the reaction
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